Indications of severe impairment include blindness, hearing loss, cerebral palsy, and significantly delayeddevelopment.
严重损伤包括失明、听力丧失、大脑性瘫痪、明显发育迟缓。
2
If enough parents deliberately or unintentionally avoided reporting delayeddevelopment, the findings could be skewed, the researchers said.
如果足够多的父母有意或无意地回避说出发育滞后的情况，那么结果就会产生偏差。
3
They now plan to study the function of the missing genes. Previous studies have suggested that deletions of these genes may be linked with delayeddevelopment, autism and schizophrenia.